diff --git a/indra/llmessage/CMakeLists.txt b/indra/llmessage/CMakeLists.txt
index 53e890040..2f9963706 100644
--- a/indra/llmessage/CMakeLists.txt
+++ b/indra/llmessage/CMakeLists.txt
@@ -27,6 +27,7 @@ set(llmessage_SOURCE_FILES
     aicurleasyrequeststatemachine.cpp
     aicurlperservice.cpp
     aicurlthread.cpp
+    aicurltimer.cpp
     aihttpheaders.cpp
     aihttptimeout.cpp
     aihttptimeoutpolicy.cpp
@@ -116,6 +117,7 @@ set(llmessage_HEADER_FILES
     aicurlperservice.h
     aicurlprivate.h
     aicurlthread.h
+    aicurltimer.h
     aihttpheaders.h
     aihttptimeout.h
     aihttptimeoutpolicy.h
diff --git a/indra/llmessage/aicurl.cpp b/indra/llmessage/aicurl.cpp
index e5dcb6ae8..04b9c5a16 100644
--- a/indra/llmessage/aicurl.cpp
+++ b/indra/llmessage/aicurl.cpp
@@ -1323,6 +1323,34 @@ void BufferedCurlEasyRequest::bad_socket(void)
   mResponder = NULL;
 }
 
+#if defined(CWDEBUG) || defined(DEBUG_CURLIO)
+static AIPerServicePtr sConnections[64];
+
+void BufferedCurlEasyRequest::connection_established(int connectionnr)
+{
+  PerService_rat per_service_r(*mPerServicePtr);
+  int n = per_service_r->connection_established();
+  llassert(sConnections[connectionnr] == NULL);		// Only one service can use a connection at a time.
+  llassert_always(connectionnr < 64);
+  sConnections[connectionnr] = mPerServicePtr;
+  Dout(dc::curlio, (void*)get_lockobj() << " Connection established (#" << connectionnr << "). Now " << n << " connections [" << (void*)&*per_service_r << "].");
+  llassert(sConnections[connectionnr] != NULL);
+}
+
+void BufferedCurlEasyRequest::connection_closed(int connectionnr)
+{
+  if (sConnections[connectionnr] == NULL)
+  {
+	Dout(dc::curlio, "Closing connection that never connected (#" << connectionnr << ").");
+	return;
+  }
+  PerService_rat per_service_r(*sConnections[connectionnr]);
+  int n = per_service_r->connection_closed();
+  sConnections[connectionnr] = NULL;
+  Dout(dc::curlio, (void*)get_lockobj() << " Connection closed (#" << connectionnr << "); " << n << " connections remaining [" << (void*)&*per_service_r << "].");
+}
+#endif
+
 void BufferedCurlEasyRequest::resetState(void)
 {
   llassert(!mResponder);
@@ -1392,6 +1420,10 @@ void BufferedCurlEasyRequest::prepRequest(AICurlEasyRequest_wat& curl_easy_reque
 	// to id.secondlife.com for marketplace.secondlife.com.
 	allow_cookies = true;
   }
+  if (responder->forbidReuse())
+  {
+	curl_easy_request_w->setopt(CURLOPT_FORBID_REUSE, 1);
+  }
   if (allow_cookies)
   {
 	// Given an empty or non-existing file or by passing the empty string (""),
diff --git a/indra/llmessage/aicurlperservice.cpp b/indra/llmessage/aicurlperservice.cpp
index a0493f1a3..8a58e2c98 100644
--- a/indra/llmessage/aicurlperservice.cpp
+++ b/indra/llmessage/aicurlperservice.cpp
@@ -75,6 +75,7 @@ AIPerService::AIPerService(void) :
 		mConcurrentConnections(CurlConcurrentConnectionsPerService),
 		mApprovedRequests(0),
 		mTotalAdded(0),
+		mEstablishedConnections(0),
 		mUsedCT(0),
 		mCTInUse(0)
 {
@@ -230,6 +231,7 @@ AIPerServicePtr AIPerService::instance(std::string const& servicename)
   if (iter == instance_map_w->end())
   {
 	iter = instance_map_w->insert(instance_map_type::value_type(servicename, new RefCountedThreadSafePerService)).first;
+	Dout(dc::curlio, "Created new service \"" << servicename << "\" [" << (void*)&*PerService_rat(*iter->second) << "]");
   }
   // Note: the creation of AIPerServicePtr MUST be protected by the lock on sInstanceMap (see release()).
   return iter->second;
@@ -339,7 +341,7 @@ void AIPerService::added_to_multi_handle(AICapabilityType capability_type)
   ++mTotalAdded;
 }
 
-void AIPerService::removed_from_multi_handle(AICapabilityType capability_type, bool downloaded_something)
+void AIPerService::removed_from_multi_handle(AICapabilityType capability_type, bool downloaded_something, bool success)
 {
   CapabilityType& ct(mCapabilityType[capability_type]);
   llassert(mTotalAdded > 0 && ct.mAdded > 0);
@@ -354,6 +356,10 @@ void AIPerService::removed_from_multi_handle(AICapabilityType capability_type, b
   {
 	mark_unused(capability_type);
   }
+  if (success)
+  {
+	ct.mFlags |= ctf_success;
+  }
 }
 
 // Returns true if the request was queued.
diff --git a/indra/llmessage/aicurlperservice.h b/indra/llmessage/aicurlperservice.h
index 0509dfd95..188d383bf 100644
--- a/indra/llmessage/aicurlperservice.h
+++ b/indra/llmessage/aicurlperservice.h
@@ -134,6 +134,11 @@ class AIPerService {
 	static U16 const ctf_empty = 1;
 	static U16 const ctf_full = 2;
 	static U16 const ctf_starvation = 4;
+	// Flags used by the HTTP debug console.
+	static U16 const ctf_success = 8;
+	static U16 const ctf_progress_mask = 0x70;
+	static U16 const ctf_progress_shift = 4;
+	static U16 const ctf_grey = 0x80;
 
 	struct CapabilityType {
 	  typedef std::deque<AICurlPrivate::BufferedCurlEasyRequestPtr> queued_request_type;
@@ -145,6 +150,7 @@ class AIPerService {
 	  U16 mFlags;								// ctf_empty: Set to true when the queue becomes precisely empty.
 	  											// ctf_full : Set to true when the queue is popped and then still isn't empty;
 												// ctf_starvation: Set to true when the queue was about to be popped but was already empty.
+												// ctf_success: Set to true when a curl request finished successfully.
 	  U32 mDownloading;							// The number of active easy handles with this service for which data was received.
 	  U16 mMaxPipelinedRequests;				// The maximum number of accepted requests for this service and (approved) capability type, that didn't finish yet.
 	  U16 mConcurrentConnections;				// The maximum number of allowed concurrent connections to the service of this capability type.
@@ -163,6 +169,7 @@ class AIPerService {
 	int mConcurrentConnections;					// The maximum number of allowed concurrent connections to this service.
 	int mApprovedRequests;						// The number of approved requests for this service by approveHTTPRequestFor that were not added to the command queue yet.
 	int mTotalAdded;							// Number of active easy handles with this service.
+	int mEstablishedConnections;				// Number of connected sockets to this service.
 
 	U32 mUsedCT;								// Bit mask with one bit per capability type. A '1' means the capability was in use since the last resetUsedCT().
 	U32 mCTInUse;								// Bit mask with one bit per capability type. A '1' means the capability is in use right now.
@@ -197,6 +204,9 @@ class AIPerService {
 	  }
 	}
   public:
+	int connection_established(void) { mEstablishedConnections++; return mEstablishedConnections; }
+	int connection_closed(void) { mEstablishedConnections--; return mEstablishedConnections; }
+
 	static bool is_approved(AICapabilityType capability_type) { return (((U32)1 << capability_type) & approved_mask); }
 	static U32 CT2mask(AICapabilityType capability_type) { return (U32)1 << capability_type; }
 	void resetUsedCt(void) { mUsedCT = mCTInUse; }
@@ -259,7 +269,7 @@ class AIPerService {
 	void added_to_command_queue(AICapabilityType capability_type) { ++mCapabilityType[capability_type].mQueuedCommands; mark_inuse(capability_type); }
 	void removed_from_command_queue(AICapabilityType capability_type) { --mCapabilityType[capability_type].mQueuedCommands; llassert(mCapabilityType[capability_type].mQueuedCommands >= 0); }
 	void added_to_multi_handle(AICapabilityType capability_type);									// Called when an easy handle for this service has been added to the multi handle.
-	void removed_from_multi_handle(AICapabilityType capability_type, bool downloaded_something);	// Called when an easy handle for this service is removed again from the multi handle.
+	void removed_from_multi_handle(AICapabilityType capability_type, bool downloaded_something, bool success);	// Called when an easy handle for this service is removed again from the multi handle.
 	void download_started(AICapabilityType capability_type) { ++mCapabilityType[capability_type].mDownloading; }
 	bool throttled(AICapabilityType capability_type) const;		// Returns true if the maximum number of allowed requests for this service/capability type have been added to the multi handle.
 	bool nothing_added(AICapabilityType capability_type) const { return mCapabilityType[capability_type].mAdded == 0; }
diff --git a/indra/llmessage/aicurlprivate.h b/indra/llmessage/aicurlprivate.h
index af8b6b267..cbb9a293d 100644
--- a/indra/llmessage/aicurlprivate.h
+++ b/indra/llmessage/aicurlprivate.h
@@ -457,6 +457,9 @@ class BufferedCurlEasyRequest : public CurlEasyRequest {
 	// So far the only such error I've seen is HTTP_BAD_REQUEST.
 	bool upload_error_status(void) const { return mStatus == HTTP_BAD_REQUEST; }
 
+	// Returns true if the request was a success.
+	bool success(void) const { return mResult == CURLE_OK && mStatus >= 200 && mStatus < 400; }
+
 	// Return true when prepRequest was already called and the object has not been
 	// invalidated as a result of calling timed_out().
 	bool isValid(void) const { return mResponder; }
@@ -466,6 +469,12 @@ class BufferedCurlEasyRequest : public CurlEasyRequest {
 
 	// Return true if any data was received.
 	bool received_data(void) const { return mTotalRawBytes > 0; }
+
+#if defined(CWDEBUG) || defined(DEBUG_CURLIO)
+	// Connection accounting for debug purposes.
+	void connection_established(int connectionnr);
+	void connection_closed(int connectionnr);
+#endif
 };
 
 inline ThreadSafeBufferedCurlEasyRequest* CurlEasyRequest::get_lockobj(void)
diff --git a/indra/llmessage/aicurlthread.cpp b/indra/llmessage/aicurlthread.cpp
index a29859048..64a6b69fe 100644
--- a/indra/llmessage/aicurlthread.cpp
+++ b/indra/llmessage/aicurlthread.cpp
@@ -34,6 +34,7 @@
 #include "aihttptimeout.h"
 #include "aicurlperservice.h"
 #include "aiaverage.h"
+#include "aicurltimer.h"
 #include "lltimer.h"		// ms_sleep, get_clock_count
 #include "llhttpstatuscodes.h"
 #include "llbuffer.h"
@@ -1433,21 +1434,35 @@ void AICurlThread::run(void)
 #endif
 	  int ready = 0;
 	  struct timeval timeout;
+	  // Update AICurlTimer::sTime_1ms.
+	  AICurlTimer::sTime_1ms = get_clock_count() * AICurlTimer::sClockWidth_1ms;
+	  Dout(dc::curl, "AICurlTimer::sTime_1ms = " << AICurlTimer::sTime_1ms);
+	  // Get the time in ms that libcurl wants us to wait for socket actions - at most - before proceeding.
 	  long timeout_ms = multi_handle_w->getTimeout();
-	  // If no timeout is set, sleep 1 second.
+	  // Set libcurl_timeout iff the shortest timeout is that of libcurl.
+	  bool libcurl_timeout = timeout_ms == 0 || (timeout_ms > 0 && !AICurlTimer::expiresBefore(timeout_ms));
+	  // If no curl timeout is set, sleep at most 4 seconds.
 	  if (LL_UNLIKELY(timeout_ms < 0))
-		timeout_ms = 1000;
-	  if (LL_UNLIKELY(timeout_ms == 0))
+		timeout_ms = 4000;
+	  // Check if some AICurlTimer expires first.
+	  if (AICurlTimer::expiresBefore(timeout_ms))
 	  {
-		if (mZeroTimeout >= 10000)
+		timeout_ms = AICurlTimer::nextExpiration();
+	  }
+	  // If we have to continue immediately, then just set a zero timeout, but only for 100 calls on a row;
+	  // after that start sleeping 1ms and later even 10ms (this should never happen).
+	  if (LL_UNLIKELY(timeout_ms <= 0))
+	  {
+		if (mZeroTimeout >= 1000)
 		{
-		  if (mZeroTimeout == 10000)
-			llwarns << "Detected more than 10000 zero-timeout calls of select() by curl thread (more than 101 seconds)!" << llendl;
-		}
-		else if (mZeroTimeout >= 1000)
+		  if (mZeroTimeout % 10000 == 0)
+			llwarns << "Detected " << mZeroTimeout << " zero-timeout calls of select() by curl thread (more than 101 seconds)!" << llendl;
 		  timeout_ms = 10;
+		}
 		else if (mZeroTimeout >= 100)
 		  timeout_ms = 1;
+		else
+		  timeout_ms = 0;
 	  }
 	  else
 	  {
@@ -1554,12 +1569,28 @@ void AICurlThread::run(void)
 		}
 		continue;
 	  }
-	  // Clock count used for timeouts.
-	  HTTPTimeout::sTime_10ms = get_clock_count() * HTTPTimeout::sClockWidth_10ms;
-	  Dout(dc::curl, "HTTPTimeout::sTime_10ms = " << HTTPTimeout::sTime_10ms);
+	  // Update the clocks.
+	  AICurlTimer::sTime_1ms = get_clock_count() * AICurlTimer::sClockWidth_1ms;
+	  Dout(dc::curl, "AICurlTimer::sTime_1ms = " << AICurlTimer::sTime_1ms);
+	  HTTPTimeout::sTime_10ms = AICurlTimer::sTime_1ms / 10;
 	  if (ready == 0)
 	  {
-		multi_handle_w->socket_action(CURL_SOCKET_TIMEOUT, 0);
+		if (libcurl_timeout)
+		{
+		  multi_handle_w->socket_action(CURL_SOCKET_TIMEOUT, 0);
+		}
+		else
+		{
+		  // Update MultiHandle::mTimeout because next loop we need to sleep timeout_ms shorter.
+		  multi_handle_w->update_timeout(timeout_ms);
+		  Dout(dc::curl, "MultiHandle::mTimeout set to " << multi_handle_w->getTimeout() << " ms.");
+		}
+		// Handle timers.
+		if (AICurlTimer::expiresBefore(1))
+		{
+		  AICurlTimer::handleExpiration();
+		}
+		// Handle stalling transactions.
 		multi_handle_w->handle_stalls();
 	  }
 	  else
@@ -1616,7 +1647,7 @@ MultiHandle::~MultiHandle()
   // Curl demands that all handles are removed from the multi session handle before calling curl_multi_cleanup.
   for(addedEasyRequests_type::iterator iter = mAddedEasyRequests.begin(); iter != mAddedEasyRequests.end(); iter = mAddedEasyRequests.begin())
   {
-	finish_easy_request(*iter, CURLE_OK);	// Error code is not used anyway.
+	finish_easy_request(*iter, CURLE_GOT_NOTHING);	// Error code is not used anyway.
 	remove_easy_request(*iter);
   }
   delete mWritePollSet;
@@ -1814,10 +1845,11 @@ CURLMcode MultiHandle::remove_easy_request(addedEasyRequests_type::iterator cons
   {
 	AICurlEasyRequest_wat curl_easy_request_w(**iter);
 	bool downloaded_something = curl_easy_request_w->received_data();
+	bool success = curl_easy_request_w->success();
 	res = curl_easy_request_w->remove_handle_from_multi(curl_easy_request_w, mMultiHandle);
 	capability_type = curl_easy_request_w->capability_type();
 	per_service = curl_easy_request_w->getPerServicePtr();
-	PerService_wat(*per_service)->removed_from_multi_handle(capability_type, downloaded_something);		// (About to be) removed from mAddedEasyRequests.
+	PerService_wat(*per_service)->removed_from_multi_handle(capability_type, downloaded_something, success);		// (About to be) removed from mAddedEasyRequests.
 #ifdef SHOW_ASSERT
 	curl_easy_request_w->mRemovedPerCommand = as_per_command;
 #endif
@@ -2169,7 +2201,7 @@ void BufferedCurlEasyRequest::update_body_bandwidth(void)
   mTotalRawBytes = total_raw_bytes;
   // Note that in some cases (like HTTP_PARTIAL_CONTENT), the output of CURLINFO_SIZE_DOWNLOAD lags
   // behind and will return 0 the first time, and the value of the previous chunk the next time.
-  // The last call from MultiHandle::finish_easy_request recorrects this, in that case.
+  // The last call from MultiHandle::finish_easy_request corrects this, in that case.
   if (raw_bytes > 0)
   {
 	U64 const sTime_40ms = curlthread::HTTPTimeout::sTime_10ms >> 2;
@@ -2323,6 +2355,58 @@ int debug_callback(CURL* handle, curl_infotype infotype, char* buf, size_t size,
   {
 	request->mDebugIsHeadOrGetMethod = true;
   }
+  if (infotype == CURLINFO_TEXT)
+  {
+	if (!strncmp(buf, "STATE: WAITCONNECT => ", 22))
+	{
+	  if (buf[22] == 'P' || buf[22] == 'D')		// PROTOCONNECT or DO.
+	  {
+		int n = size - 1;
+		while (buf[n] != ')')
+		{
+		  llassert(n > 56);
+		  --n;
+		}
+		int connectionnr = 0;
+		int factor = 1;
+		do
+		{
+		  llassert(n > 56);
+		  --n;
+		  connectionnr += factor * (buf[n] - '0');
+		  factor *= 10;
+		}
+		while(buf[n - 1] != '#');
+		// A new connection was established.
+		request->connection_established(connectionnr);
+	  }
+	  else
+	  {
+	  	llassert(buf[22] == 'C');				// COMPLETED (connection failure).
+	  }
+	}
+	else if (!strncmp(buf, "Closing connection", 18))
+	{
+	  int n = size - 1;
+	  while (!std::isdigit(buf[n]))
+	  {
+		llassert(n > 20);
+		--n;
+	  }
+	  int connectionnr = 0;
+	  int factor = 1;
+	  do
+	  {
+		llassert(n > 19);
+		connectionnr += factor * (buf[n] - '0');
+		factor *= 10;
+		--n;
+	  }
+	  while(buf[n] != '#');
+	  // A connection was closed.
+	  request->connection_closed(connectionnr);
+	}
+  }
 
 #ifdef DEBUG_CURLIO
   if (!debug_curl_print_debug(handle))
@@ -2769,7 +2853,7 @@ AIPerService::Approvement* AIPerService::approveHTTPRequestFor(AIPerServicePtr c
 	equal = pipelined_requests_per_capability_type == ct.mMaxPipelinedRequests;
 	increment_threshold = ct.mFlags & ctf_starvation;
 	decrement_threshold = (ct.mFlags & (ctf_empty | ctf_full)) == ctf_full;
-	ct.mFlags = 0;
+	ct.mFlags &= ~(ctf_empty|ctf_full|ctf_starvation);
 	if (decrement_threshold)
 	{
 	  if ((int)ct.mMaxPipelinedRequests > ct.mConcurrentConnections)
diff --git a/indra/llmessage/aicurlthread.h b/indra/llmessage/aicurlthread.h
index 080456652..908456b13 100644
--- a/indra/llmessage/aicurlthread.h
+++ b/indra/llmessage/aicurlthread.h
@@ -93,6 +93,9 @@ class MultiHandle : public CurlMultiHandle
 	// Returns how long to wait for socket action before calling socket_action(CURL_SOCKET_TIMEOUT, 0), in ms.
 	int getTimeout(void) const { return mTimeout; }
 
+	// We slept delta_ms instead of mTimeout ms. Update mTimeout to be the remaining time.
+	void update_timeout(long delta_ms) { mTimeout -= delta_ms; }
+
 	// This is called before sleeping, after calling (one or more times) socket_action.
 	void check_msg_queue(void);
 
diff --git a/indra/llmessage/aicurltimer.cpp b/indra/llmessage/aicurltimer.cpp
new file mode 100644
index 000000000..7c2e3dc51
--- /dev/null
+++ b/indra/llmessage/aicurltimer.cpp
@@ -0,0 +1,110 @@
+/**
+ * @file aicurltimer.cpp
+ *
+ * Copyright (c) 2013, Aleric Inglewood.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution.
+ *
+ * CHANGELOG
+ *   and additional copyright holders.
+ *
+ *   29/06/2013
+ *   - Initial version, written by Aleric Inglewood @ SL
+ */
+
+// An AICurlTimer object provides a callback API for timer events
+// by and from the curl thread. It is NOT threadsafe. Everything
+// has to be called from the curl thread.
+//
+// Typical usage:
+//
+// AICurlTimer timer;
+// ...
+// // In curl thread (after successful construction is guaranteed).
+// timer.create(5.5, boost::bind(&the_callback, <optional params>));	// Call the_callback(<optional params>) in 5.5 seconds.
+//
+// The callback function is always called by the curl thread.
+//
+// If timer.cancel() is called before the timer expires, then the callback
+// function isn't called. Calling cancel() multiple times is not a problem.
+// Note: It is not allowed to call cancel() is from the callback function
+// (and rather pointless).
+//
+// The timer object can be reused (by calling create() again), but
+// only after either the callback function was called, or after cancel()
+// returned. Most notably, you can call create() again from inside the
+// callback function to "restart" the timer.
+//
+
+#include "aicurltimer.h"
+#include "lltimer.h"
+
+static U64 const NEVER = ((U64)1) << 60;	// The year 36,560,871.
+
+//static
+F64 const AICurlTimer::sClockWidth_1ms = 1000.0 / calc_clock_frequency();       // Time between two clock ticks, in 1ms units.
+U64 AICurlTimer::sTime_1ms;														// Time in 1ms units, set once per select() entry.
+U64 AICurlTimer::sNextExpiration;
+AICurlTimer::timer_list_type AICurlTimer::sTimerList;
+
+void AICurlTimer::create(deltams_type expiration, signal_type::slot_type const& slot)
+{
+	AIRunningCurlTimer new_timer(expiration, this);
+	llassert(mHandle.mRunningTimer == sTimerList.end());	// Create may only be called when the timer isn't already running.
+	mHandle.init(sTimerList.insert(new_timer), slot);
+	sNextExpiration = sTimerList.begin()->expiration();
+}
+
+void AICurlTimer::cancel(void)
+{
+    if (mHandle.mRunningTimer != sTimerList.end())
+	{
+		sTimerList.erase(mHandle.mRunningTimer);
+		mHandle.mRunningTimer = sTimerList.end();
+		sNextExpiration = sTimerList.empty() ? NEVER : sTimerList.begin()->expiration();
+	}
+}
+
+void AICurlTimer::handleExpiration(void)
+{
+	for(;;)
+	{
+		if (sTimerList.empty())
+		{
+			// No running timers left.
+			sNextExpiration = NEVER;
+			break;
+		}
+		timer_list_type::iterator running_timer = sTimerList.begin();
+		sNextExpiration = running_timer->expiration();
+		if (sNextExpiration > sTime_1ms)
+		{
+			// Didn't expire yet.
+			break;
+		}
+
+		Handle& handle(running_timer->getTimer()->mHandle);
+		llassert_always(running_timer == handle.mRunningTimer);
+		handle.mRunningTimer = sTimerList.end();
+		running_timer->do_callback();		// May not throw exceptions.
+
+		// Erase the timer from the running list.
+		sTimerList.erase(running_timer);
+	}
+}
+
diff --git a/indra/llmessage/aicurltimer.h b/indra/llmessage/aicurltimer.h
new file mode 100644
index 000000000..8b30a9ac6
--- /dev/null
+++ b/indra/llmessage/aicurltimer.h
@@ -0,0 +1,144 @@
+/**
+ * @file aicurltimer.h
+ * @brief Implementation of AICurlTimer.
+ *
+ * Copyright (c) 2013, Aleric Inglewood.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution.
+ *
+ * CHANGELOG
+ *   and additional copyright holders.
+ *
+ *   29/06/2013
+ *   Initial version, written by Aleric Inglewood @ SL
+ */
+
+#ifndef AICURLTIMER_H
+#define AICURLTIMER_H
+
+#include "llerror.h"			// llassert
+#include "stdtypes.h"			// U64, F64
+#include <boost/signals2.hpp>
+#include <set>
+
+class AICurlTimer
+{
+  protected:
+	typedef boost::signals2::signal<void (void)> signal_type;
+	typedef long deltams_type;
+
+  private:
+	// Use separate struct for this object because it is non-copyable.
+	struct Signal {
+		signal_type mSignal;
+	};
+
+	class AIRunningCurlTimer {
+	  private:
+		U64 mExpire;						// Time at which the timer expires, in miliseconds since the epoch (compared to LLCurlTimer::sTime_1ms).
+		AICurlTimer* mTimer;				// The actual timer.
+		// Can be mutable, since only the mExpire is used for ordering this object in the multiset AICurlTimer::sTimerList.
+		mutable Signal* mCallback;			// Pointer to callback struct, or NULL when the object wasn't added to sTimerList yet.
+
+	  public:
+		AIRunningCurlTimer(deltams_type expiration, AICurlTimer* timer) : mExpire(AICurlTimer::sTime_1ms + expiration), mTimer(timer), mCallback(NULL) { }
+		~AIRunningCurlTimer() { delete mCallback; }
+
+		// This function is called after the final object was added to sTimerList (where it is initialized in-place).
+		void init(signal_type::slot_type const& slot) const
+			{
+			  // We may only call init() once.
+			  llassert(!mCallback);
+			  mCallback = new Signal;
+			  mCallback->mSignal.connect(slot);
+			}
+
+		// Order AICurlTimer::sTimerList so that the timer that expires first is up front.
+		friend bool operator<(AIRunningCurlTimer const& ft1, AIRunningCurlTimer const& ft2) { return ft1.mExpire < ft2.mExpire; }
+
+		void do_callback(void) const { mCallback->mSignal(); }
+		U64 expiration(void) const { return mExpire; }
+		AICurlTimer* getTimer(void) const { return mTimer; }
+
+#if LL_DEBUG
+		// May not copy this object after it was initialized.
+		AIRunningCurlTimer(AIRunningCurlTimer const& running_curl_timer) :
+			mExpire(running_curl_timer.mExpire), mTimer(running_curl_timer.mTimer), mCallback(running_curl_timer.mCallback)
+			{ llassert(!mCallback); }
+#endif
+	};
+
+	typedef std::multiset<AIRunningCurlTimer> timer_list_type;
+	static timer_list_type sTimerList;			// List with all running timers.
+	static U64 sNextExpiration;					// Cache of smallest value in sTimerList.
+
+  public:
+	static F64 const sClockWidth_1ms;			// Time between two clock ticks in 1 ms units.
+	static U64 sTime_1ms;						// Time since the epoch in 1 ms units. Set by AICurlThread::run().
+
+	static deltams_type nextExpiration(void) { return static_cast<deltams_type>(sNextExpiration - sTime_1ms); }
+	static bool expiresBefore(deltams_type timeout_ms) { return sNextExpiration < sTime_1ms + timeout_ms; }
+
+  private:
+	class Handle {
+	  public:
+		timer_list_type::iterator mRunningTimer;	// Points to the running timer, or to sTimerList.end() when not running.
+													// Access to this iterator is protected by the AICurlTimer::sMutex!
+
+		// Constructor for a not-running timer.
+		Handle(void) : mRunningTimer(sTimerList.end()) { }
+
+		// Actual initialization used by AICurlTimer::create.
+		void init(timer_list_type::iterator const& running_timer, signal_type::slot_type const& slot)
+			{
+			  mRunningTimer = running_timer;
+			  mRunningTimer->init(slot);
+			}
+
+	  private:
+		// No assignment operator.
+	  	Handle& operator=(Handle const&) { return *this; }
+	};
+
+	Handle mHandle;
+
+  public:
+	// Construct an AICurlTimer that is not running.
+	AICurlTimer(void) { }
+
+	// Construction of a running AICurlTimer with expiration time expiration in miliseconds, and callback slot.
+	AICurlTimer(deltams_type expiration, signal_type::slot_type const& slot) { create(expiration, slot); }
+
+	// Destructing the AICurlTimer object terminates the running timer (if still running).
+	// Note that cancel() must have returned BEFORE anything is destructed that would disallow the callback function to be called.
+	// So, if the AICurlTimer is a member of an object whose callback function is called then cancel() has
+	// to be called manually (or from the destructor of THAT object), before that object is destructed.
+	// Cancel may be called multiple times.
+	~AICurlTimer() { cancel(); }
+
+	void create(deltams_type expiration, signal_type::slot_type const& slot);
+	void cancel(void);
+
+	bool isRunning(void) const { return mHandle.mRunningTimer != sTimerList.end(); }
+
+  public:
+	static void handleExpiration(void);
+};
+
+#endif
+
diff --git a/indra/llmessage/aihttptimeoutpolicy.cpp b/indra/llmessage/aihttptimeoutpolicy.cpp
index 502cabf37..65451b34a 100644
--- a/indra/llmessage/aihttptimeoutpolicy.cpp
+++ b/indra/llmessage/aihttptimeoutpolicy.cpp
@@ -677,21 +677,46 @@ AIHTTPTimeoutPolicyBase AIHTTPTimeoutPolicy::sDebugSettingsCurlTimeout(
 // Note: All operator objects (Transaction, Connect, etc) must be globals (not temporaries)!
 // To enforce this they are passes as reference to non-const (but will never be changed).
 
-// This used to be '5 seconds'.
-Transaction transactionOp5s(5);
-AIHTTPTimeoutPolicyBase transfer_5s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
-	transactionOp5s
+// Used for baseCapabilitiesComplete - which is retried many times, and needs to be rather "fast".
+// Most connection succeed under 5 seconds.
+Connect connectOp5s(5);
+AIHTTPTimeoutPolicyBase connect_5s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+	connectOp5s
 	);
 
-// This used to be '18 seconds'.
-Transaction transactionOp18s(18);
-AIHTTPTimeoutPolicyBase transfer_18s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+// Some services connects rather slow. We need to enforce that connect timeouts never drop below 10 seconds for the policies that shorten the transaction time.
+Connect connectOp10s(10);
+AIHTTPTimeoutPolicyBase connect_10s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+	connectOp10s
+	);
+
+// The texture/mesh service suffers often from timeouts, give them a much longer connect timeout than normal.
+Connect connectOp30s(30);
+AIHTTPTimeoutPolicyBase connect_30s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+	connectOp30s
+	);
+
+// Extreme measures.
+Connect connectOp60s(60);
+AIHTTPTimeoutPolicyBase connect_60s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+	connectOp60s
+	);
+
+// This used to be '18 seconds'. Pass connectOp5s or it would become 3 seconds (which is working already pretty good actually).
+Transaction transactionOp18s(18, connectOp5s);
+AIHTTPTimeoutPolicyBase transfer_18s_connect_5s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
 	transactionOp18s
 	);
 
-// This used to be '30 seconds'.
-Transaction transactionOp30s(30);
-AIHTTPTimeoutPolicyBase transfer_30s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+// This used to be '18 seconds'. Pass connectOp10s or it would become 3 seconds.
+Transaction transactionOp22s(22, connectOp10s);
+AIHTTPTimeoutPolicyBase transfer_22s_connect_10s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
+	transactionOp22s
+	);
+
+// This used to be '30 seconds'. Pass connectOp10s or it would become 3 seconds.
+Transaction transactionOp30s(30, connectOp10s);
+AIHTTPTimeoutPolicyBase transfer_30s_connect_10s(AIHTTPTimeoutPolicyBase::getDebugSettingsCurlTimeout(),
 	transactionOp30s
 	);
 
@@ -881,7 +906,7 @@ P(asyncConsoleResponder);
 P(avatarPickerResponder);
 P(authHandler);
 P(avatarNameResponder);
-P2(baseCapabilitiesComplete,					transfer_18s);
+P2(baseCapabilitiesComplete,					transfer_18s_connect_5s);
 P(blockingLLSDPost);
 P(blockingLLSDGet);
 P(blockingRawGet);
@@ -889,7 +914,7 @@ P(charactersResponder);
 P(checkAgentAppearanceServiceResponder);
 P(classifiedStatsResponder);
 P(consoleResponder);
-P2(crashLoggerResponder,						transfer_5s);
+P2(crashLoggerResponder,						transfer_22s_connect_10s);
 P(createInventoryCategoryResponder);
 P(emeraldDicDownloader);
 P(environmentApplyResponder);
@@ -902,7 +927,7 @@ P(fetchScriptLimitsRegionDetailsResponder);
 P(fetchScriptLimitsRegionInfoResponder);
 P(fetchScriptLimitsRegionSummaryResponder);
 P(fnPtrResponder);
-P2(gamingDataReceived,							transfer_18s);
+P2(gamingDataReceived,							transfer_22s_connect_10s);
 P2(groupMemberDataResponder,					transfer_300s);
 P2(groupProposalBallotResponder,				transfer_300s);
 P(homeLocationResponder);
@@ -916,14 +941,14 @@ P(lcl_responder);
 P(MPImportGetResponder);
 P(MPImportPostResponder);
 P(mapLayerResponder);
-P2(maturityPreferences,							transfer_30s);
+P2(maturityPreferences,							transfer_30s_connect_10s);
 P(mediaDataClientResponder);
 P(mediaTypeResponder);
-P(meshDecompositionResponder);
-P(meshHeaderResponder);
-P(meshLODResponder);
-P(meshPhysicsShapeResponder);
-P(meshSkinInfoResponder);
+P2(meshDecompositionResponder,					connect_30s);
+P2(meshHeaderResponder,							connect_30s);
+P2(meshLODResponder,							connect_30s);
+P2(meshPhysicsShapeResponder,					connect_30s);
+P2(meshSkinInfoResponder,						connect_30s);
 P(mimeDiscoveryResponder);
 P(moderationResponder);
 P(navMeshRebakeResponder);
@@ -941,7 +966,7 @@ P(requestAgentUpdateAppearance);
 P(responderIgnore);
 P(sessionInviteResponder);
 P(setDisplayNameResponder);
-P2(simulatorFeaturesReceived,					transfer_18s);
+P2(simulatorFeaturesReceived,					transfer_22s_connect_10s);
 P(startConferenceChatResponder);
 P2(startGroupVoteResponder,						transfer_300s);
 P(terrainLinksetsResponder);
diff --git a/indra/llmessage/llhttpclient.h b/indra/llmessage/llhttpclient.h
index af11a6687..b4ce6facc 100644
--- a/indra/llmessage/llhttpclient.h
+++ b/indra/llmessage/llhttpclient.h
@@ -217,6 +217,10 @@ public:
 		// Derived classes that implement completed_headers()/completedHeaders() should return true here.
 		virtual bool needsHeaders(void) const { return false; }
 
+		// A derived class should return true if curl should close the connection when done.
+		// The default is to keep connections open for possible reuse.
+		virtual bool forbidReuse(void) const { return false; }
+
 		// A derived class should return true if curl should follow redirections.
 		// The default is not to follow redirections.
 		virtual bool followRedir(void) const { return false; }
diff --git a/indra/newview/aihttpview.cpp b/indra/newview/aihttpview.cpp
index 86849575f..58bc2f689 100644
--- a/indra/newview/aihttpview.cpp
+++ b/indra/newview/aihttpview.cpp
@@ -76,10 +76,11 @@ void AIServiceBar::draw()
   LLFontGL::getFontMonospace()->renderUTF8(mName, 0, start, height, text_color, LLFontGL::LEFT, LLFontGL::TOP);
   start += LLFontGL::getFontMonospace()->getWidth(mName);
   std::string text;
-  AIPerService::CapabilityType const* cts;
+  AIPerService::CapabilityType* cts;
   U32 is_used;
   U32 is_inuse;
   int total_added;
+  int established_connections;
   int concurrent_connections;
   size_t bandwidth;
   {
@@ -87,6 +88,7 @@ void AIServiceBar::draw()
 	is_used = per_service_r->is_used();
 	is_inuse = per_service_r->is_inuse();
 	total_added = per_service_r->mTotalAdded;
+	established_connections = per_service_r->mEstablishedConnections;
 	concurrent_connections = per_service_r->mConcurrentConnections;
 	bandwidth = per_service_r->bandwidth().truncateData(AIHTTPView::getTime_40ms());
 	cts = per_service_r->mCapabilityType;	// Not thread-safe, but we're only reading from it and only using the results to show in a debug console.
@@ -94,26 +96,62 @@ void AIServiceBar::draw()
   for (int col = 0; col < number_of_capability_types; ++col)
   {
 	AICapabilityType capability_type = static_cast<AICapabilityType>(col);
-	AIPerService::CapabilityType const& ct(cts[capability_type]);
+	AIPerService::CapabilityType& ct(cts[capability_type]);
 	start = mHTTPView->updateColumn(col, start);
 	U32 mask = AIPerService::CT2mask(capability_type);
 	if (!(is_used & mask))
 	{
 	  text = " |              ";
 	}
-	else if (col < 2)
-	{
-	  text = llformat(" | %hu-%hu-%lu,{%hu/%hu,%u}/%u", ct.mApprovedRequests, ct.mQueuedCommands, ct.mQueuedRequests.size(), ct.mAdded, ct.mConcurrentConnections, ct.mDownloading, ct.mMaxPipelinedRequests);
-	}
 	else
 	{
-	  text = llformat(" | --%hu-%lu,{%hu/%hu,%u}", ct.mQueuedCommands, ct.mQueuedRequests.size(), ct.mAdded, ct.mConcurrentConnections, ct.mDownloading);
+	  if (col < 2)
+	  {
+		text = llformat(" | %hu-%hu-%lu,{%hu/%hu,%u}/%u",
+			ct.mApprovedRequests, ct.mQueuedCommands, ct.mQueuedRequests.size(),
+			ct.mAdded, ct.mConcurrentConnections, ct.mDownloading,
+			ct.mMaxPipelinedRequests);
+	  }
+	  else
+	  {
+		text = llformat(" | --%hu-%lu,{%hu/%hu,%u}",
+			ct.mQueuedCommands, ct.mQueuedRequests.size(),
+			ct.mAdded, ct.mConcurrentConnections, ct.mDownloading);
+	  }
+	  if (capability_type == cap_texture || capability_type == cap_mesh)
+	  {
+		if (!(is_inuse & mask))
+		{
+		  ct.mFlags |= AIPerService::ctf_grey;
+		}
+		else
+		{
+		  bool show = true;
+		  int progress_counter = (ct.mFlags & AIPerService::ctf_progress_mask) >> AIPerService::ctf_progress_shift;
+		  if ((ct.mFlags & AIPerService::ctf_success))
+		  {
+			show = !(ct.mFlags & AIPerService::ctf_grey);
+			ct.mFlags &= ~(AIPerService::ctf_success|AIPerService::ctf_grey|AIPerService::ctf_progress_mask);
+			progress_counter = (progress_counter + 1) % 8;
+			ct.mFlags |= progress_counter << AIPerService::ctf_progress_shift;
+		  }
+		  if (show)
+		  {
+			static char const* progress_utf8[8] = { " \xe2\xac\x93", " \xe2\xac\x95", " \xe2\x97\xa7", " \xe2\x97\xa9", " \xe2\xac\x92", " \xe2\xac\x94", " \xe2\x97\xa8", " \xe2\x97\xaa" };
+			text += progress_utf8[progress_counter];
+		  }
+		}
+	  }
 	}
 	LLFontGL::getFontMonospace()->renderUTF8(text, 0, start, height, ((is_inuse & mask) == 0) ? LLColor4::grey2 : text_color, LLFontGL::LEFT, LLFontGL::TOP);
 	start += LLFontGL::getFontMonospace()->getWidth(text);
   }
   start = mHTTPView->updateColumn(mc_col, start);
+#if defined(CWDEBUG) || defined(DEBUG_CURLIO)
+  text = llformat(" | %d,%d/%d", total_added, established_connections, concurrent_connections);
+#else
   text = llformat(" | %d/%d", total_added, concurrent_connections);
+#endif
   LLFontGL::getFontMonospace()->renderUTF8(text, 0, start, height, text_color, LLFontGL::LEFT, LLFontGL::TOP);
   start += LLFontGL::getFontMonospace()->getWidth(text);
   start = mHTTPView->updateColumn(bw_col, start);
@@ -174,7 +212,7 @@ void AIGLHTTPHeaderBar::draw(void)
 
   // First header line.
   F32 height = v_offset + sLineHeight * number_of_header_lines;
-  text = "HTTP console -- [approved]-commandQ-curlQ,{added/max,downloading}[/max]";
+  text = "HTTP console -- [approved]-commandQ-curlQ,{added/max,downloading}[/max][ completed]";
   LLFontGL::getFontMonospace()->renderUTF8(text, 0, h_offset, height, text_color, LLFontGL::LEFT, LLFontGL::TOP);
   text = " | Added/Max";
   U32 start = mHTTPView->updateColumn(mc_col, 100);
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 29a339eca..5cb16e6d9 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -644,7 +644,7 @@ bool LLAppViewer::init()
 		AIHTTPTimeoutPolicy policy_tmp(
 			"CurlTimeout* Debug Settings",
 			gSavedSettings.getU32("CurlTimeoutDNSLookup"),
-			/*gSavedSettings.getU32("CurlTimeoutConnect")   Temporary HACK: 30 is the current max*/ 30,
+			gSavedSettings.getU32("CurlTimeoutConnect"),
 			gSavedSettings.getU32("CurlTimeoutReplyDelay"),
 			gSavedSettings.getU32("CurlTimeoutLowSpeedTime"),
 			gSavedSettings.getU32("CurlTimeoutLowSpeedLimit"),
diff --git a/indra/newview/llxmlrpcresponder.h b/indra/newview/llxmlrpcresponder.h
index 3c32cd2a6..4a5f29077 100644
--- a/indra/newview/llxmlrpcresponder.h
+++ b/indra/newview/llxmlrpcresponder.h
@@ -107,6 +107,7 @@ public:
 	LLXMLRPCValue responseValue(void) const;
 
 	/*virtual*/ bool needsHeaders(void) const { return true; }
+	/*virtual*/ bool forbidReuse(void) const { return true; }
 	/*virtual*/ void received_HTTP_header(void) { mReceivedHTTPHeader = true; LLHTTPClient::ResponderBase::received_HTTP_header(); }
 	/*virtual*/ void completed_headers(U32 status, std::string const& reason, AITransferInfo* info);
 	/*virtual*/ void completedRaw(U32 status, std::string const& reason, LLChannelDescriptors const& channels, buffer_ptr_t const& buffer);